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re PR go/60288 (gccgo crashes compiling '*func_ptr(0)')

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PR go/60288
compiler: Avoid crash, give error for *&x when x is not addressable.

From-SVN: r207960
This commit is contained in:
Ian Lance Taylor 2014-02-20 15:20:26 +00:00
parent efd2d3c8c4
commit 7f5e818877
1 changed files with 13 additions and 1 deletions
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14
gcc/go/gofrontend/expressions.cc
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@ -3792,6 +3792,12 @@ Unary_expression::do_lower(Gogo*, Named_object*, Statement_inserter*, int)
if (e == expr)
{
// *&x == x.
if (!ue->expr_->is_addressable() && !ue->create_temp_)
{
error_at(ue->location(),
"invalid operand for unary %<&%>");
this->set_is_error();
}
return ue->expr_;
}
ue->set_does_not_escape();
@ -3828,6 +3834,9 @@ Expression*
Unary_expression::do_flatten(Gogo* gogo, Named_object*,
Statement_inserter* inserter)
{
if (this->is_error_expression() || this->expr_->is_error_expression())
return Expression::make_error(this->location());
Location location = this->location();
if (this->op_ == OPERATOR_MULT
&& !this->expr_->is_variable())
@ -4167,7 +4176,10 @@ Unary_expression::do_check_types(Gogo*)
if (!this->expr_->is_addressable())
{
if (!this->create_temp_)
this->report_error(_("invalid operand for unary %<&%>"));
{
error_at(this->location(), "invalid operand for unary %<&%>");
this->set_is_error();
}
}
else
{